Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
d8e0539e | 41 | #include <linux/crc32.h> |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <asm/uaccess.h> |
44 | ||
4ce79717 | 45 | #include "nfs4_fs.h" |
a72b4422 | 46 | #include "callback.h" |
1da177e4 | 47 | #include "delegation.h" |
d9ef5a8c | 48 | #include "iostat.h" |
f7b422b1 | 49 | #include "internal.h" |
8ec442ae | 50 | #include "fscache.h" |
e571cbf1 | 51 | #include "dns_resolve.h" |
e5e94017 | 52 | #include "pnfs.h" |
ab7017a3 | 53 | #include "nfs.h" |
1b340d01 | 54 | #include "netns.h" |
1da177e4 LT |
55 | |
56 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 57 | |
f43bf0be TM |
58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
59 | ||
60 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 62 | |
1da177e4 | 63 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 65 | |
e18b890b | 66 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 67 | |
1da177e4 LT |
68 | static inline unsigned long |
69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
70 | { | |
71 | return nfs_fileid_to_ino_t(fattr->fileid); | |
72 | } | |
73 | ||
72cb77f4 TM |
74 | /** |
75 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
76 | * @word: long word containing the bit lock | |
77 | */ | |
78 | int nfs_wait_bit_killable(void *word) | |
79 | { | |
80 | if (fatal_signal_pending(current)) | |
81 | return -ERESTARTSYS; | |
d310310c | 82 | freezable_schedule(); |
72cb77f4 TM |
83 | return 0; |
84 | } | |
89d77c8f | 85 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 86 | |
f43bf0be TM |
87 | /** |
88 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
89 | * @fileid: 64-bit fileid | |
90 | * | |
91 | * This function returns a 32-bit inode number if the boot parameter | |
92 | * nfs.enable_ino64 is zero. | |
93 | */ | |
94 | u64 nfs_compat_user_ino64(u64 fileid) | |
95 | { | |
3fa0b4e2 FF |
96 | #ifdef CONFIG_COMPAT |
97 | compat_ulong_t ino; | |
98 | #else | |
99 | unsigned long ino; | |
100 | #endif | |
f43bf0be TM |
101 | |
102 | if (enable_ino64) | |
103 | return fileid; | |
104 | ino = fileid; | |
105 | if (sizeof(ino) < sizeof(fileid)) | |
106 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
107 | return ino; | |
108 | } | |
109 | ||
19d87ca3 | 110 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 111 | { |
da6d503a TM |
112 | /* |
113 | * The following should never happen... | |
114 | */ | |
115 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 116 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 117 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 118 | nfs_access_zap_cache(inode); |
ef79c097 | 119 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 | 120 | } |
89d77c8f | 121 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 122 | |
b57922d9 AV |
123 | void nfs_evict_inode(struct inode *inode) |
124 | { | |
125 | truncate_inode_pages(&inode->i_data, 0); | |
dbd5768f | 126 | clear_inode(inode); |
b57922d9 AV |
127 | nfs_clear_inode(inode); |
128 | } | |
129 | ||
29884df0 TM |
130 | /** |
131 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
132 | */ | |
133 | int nfs_sync_mapping(struct address_space *mapping) | |
134 | { | |
5cf95214 | 135 | int ret = 0; |
29884df0 | 136 | |
5cf95214 TM |
137 | if (mapping->nrpages != 0) { |
138 | unmap_mapping_range(mapping, 0, 0, 0); | |
139 | ret = nfs_wb_all(mapping->host); | |
140 | } | |
29884df0 TM |
141 | return ret; |
142 | } | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * Invalidate the local caches | |
146 | */ | |
b37b03b7 | 147 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
148 | { |
149 | struct nfs_inode *nfsi = NFS_I(inode); | |
150 | int mode = inode->i_mode; | |
151 | ||
91d5b470 CL |
152 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
153 | ||
c7c20973 TM |
154 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
155 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 156 | |
c3f52af3 | 157 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
1da177e4 | 158 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
55296809 | 159 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 160 | else |
55296809 | 161 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 162 | } |
dc59250c | 163 | |
b37b03b7 TM |
164 | void nfs_zap_caches(struct inode *inode) |
165 | { | |
166 | spin_lock(&inode->i_lock); | |
167 | nfs_zap_caches_locked(inode); | |
dc59250c | 168 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
169 | } |
170 | ||
cd9ae2b6 TM |
171 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
172 | { | |
173 | if (mapping->nrpages != 0) { | |
174 | spin_lock(&inode->i_lock); | |
175 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
176 | spin_unlock(&inode->i_lock); | |
177 | } | |
178 | } | |
179 | ||
f41f7418 | 180 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
181 | { |
182 | void (*clear_acl_cache)(struct inode *); | |
183 | ||
184 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
185 | if (clear_acl_cache != NULL) | |
186 | clear_acl_cache(inode); | |
dc59250c | 187 | spin_lock(&inode->i_lock); |
55296809 | 188 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 189 | spin_unlock(&inode->i_lock); |
1da177e4 | 190 | } |
1c606fb7 | 191 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 192 | |
c4812998 TM |
193 | void nfs_invalidate_atime(struct inode *inode) |
194 | { | |
195 | spin_lock(&inode->i_lock); | |
196 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
197 | spin_unlock(&inode->i_lock); | |
198 | } | |
ddda8e0a | 199 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 200 | |
1da177e4 | 201 | /* |
b37b03b7 TM |
202 | * Invalidate, but do not unhash, the inode. |
203 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 204 | */ |
b37b03b7 | 205 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 206 | { |
3a10c30a | 207 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 208 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
209 | } |
210 | ||
211 | struct nfs_find_desc { | |
212 | struct nfs_fh *fh; | |
213 | struct nfs_fattr *fattr; | |
214 | }; | |
215 | ||
216 | /* | |
217 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
218 | * this, and re-exported directories (also seen in NFSv2) | |
219 | * we are forced to allow 2 different inodes to have the same | |
220 | * i_ino. | |
221 | */ | |
222 | static int | |
223 | nfs_find_actor(struct inode *inode, void *opaque) | |
224 | { | |
225 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
226 | struct nfs_fh *fh = desc->fh; | |
227 | struct nfs_fattr *fattr = desc->fattr; | |
228 | ||
229 | if (NFS_FILEID(inode) != fattr->fileid) | |
230 | return 0; | |
231 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
232 | return 0; | |
233 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
234 | return 0; | |
235 | return 1; | |
236 | } | |
237 | ||
238 | static int | |
239 | nfs_init_locked(struct inode *inode, void *opaque) | |
240 | { | |
241 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
242 | struct nfs_fattr *fattr = desc->fattr; | |
243 | ||
99fadcd7 | 244 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
245 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
246 | return 0; | |
247 | } | |
248 | ||
1da177e4 LT |
249 | /* |
250 | * This is our front-end to iget that looks up inodes by file handle | |
251 | * instead of inode number. | |
252 | */ | |
253 | struct inode * | |
254 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
255 | { | |
256 | struct nfs_find_desc desc = { | |
257 | .fh = fh, | |
258 | .fattr = fattr | |
259 | }; | |
03f28e3a | 260 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
261 | unsigned long hash; |
262 | ||
7ebb9315 BS |
263 | nfs_attr_check_mountpoint(sb, fattr); |
264 | ||
533eb461 AA |
265 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
266 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 267 | goto out_no_inode; |
9e6e70f8 | 268 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 269 | goto out_no_inode; |
1da177e4 LT |
270 | |
271 | hash = nfs_fattr_to_ino_t(fattr); | |
272 | ||
03f28e3a TM |
273 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
274 | if (inode == NULL) { | |
275 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 276 | goto out_no_inode; |
03f28e3a | 277 | } |
1da177e4 LT |
278 | |
279 | if (inode->i_state & I_NEW) { | |
280 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 281 | unsigned long now = jiffies; |
1da177e4 LT |
282 | |
283 | /* We set i_ino for the few things that still rely on it, | |
284 | * such as stat(2) */ | |
285 | inode->i_ino = hash; | |
286 | ||
287 | /* We can't support update_atime(), since the server will reset it */ | |
288 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
289 | inode->i_mode = fattr->mode; | |
62ab460c TM |
290 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
291 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 292 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
293 | /* Why so? Because we want revalidate for devices/FIFOs, and |
294 | * that's precisely what we have in nfs_file_inode_operations. | |
295 | */ | |
8fa5c000 | 296 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 297 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 298 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
299 | inode->i_data.a_ops = &nfs_file_aops; |
300 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
301 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 302 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 303 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 304 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 305 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
306 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
307 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
308 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
309 | inode->i_op = &nfs_referral_inode_operations; | |
310 | else | |
311 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 312 | inode->i_fop = NULL; |
36d43a43 | 313 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 314 | } |
1da177e4 LT |
315 | } else if (S_ISLNK(inode->i_mode)) |
316 | inode->i_op = &nfs_symlink_inode_operations; | |
317 | else | |
318 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
319 | ||
9e6e70f8 TM |
320 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
321 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
322 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 323 | inode->i_version = 0; |
9e6e70f8 | 324 | inode->i_size = 0; |
6d6b77f1 | 325 | clear_nlink(inode); |
9e6e70f8 TM |
326 | inode->i_uid = -2; |
327 | inode->i_gid = -2; | |
328 | inode->i_blocks = 0; | |
329 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
330 | nfsi->write_io = 0; |
331 | nfsi->read_io = 0; | |
9e6e70f8 | 332 | |
33801147 | 333 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 334 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
335 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
336 | inode->i_atime = fattr->atime; | |
62ab460c TM |
337 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
338 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
339 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
340 | inode->i_mtime = fattr->mtime; | |
62ab460c | 341 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 342 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
343 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
344 | inode->i_ctime = fattr->ctime; | |
62ab460c | 345 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 346 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 347 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 348 | inode->i_version = fattr->change_attr; |
62ab460c | 349 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 350 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
351 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
352 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
353 | else |
354 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 355 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 356 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 357 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
358 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
359 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
360 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
361 | inode->i_uid = fattr->uid; | |
62ab460c | 362 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 363 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
364 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
365 | inode->i_gid = fattr->gid; | |
62ab460c | 366 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 367 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
368 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
369 | inode->i_blocks = fattr->du.nfs2.blocks; | |
370 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
371 | /* |
372 | * report the blocks in 512byte units | |
373 | */ | |
374 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
375 | } |
376 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 377 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 378 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 379 | |
ef79c097 DH |
380 | nfs_fscache_init_inode_cookie(inode); |
381 | ||
1da177e4 LT |
382 | unlock_new_inode(inode); |
383 | } else | |
384 | nfs_refresh_inode(inode, fattr); | |
4f1abd22 | 385 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
1da177e4 LT |
386 | inode->i_sb->s_id, |
387 | (long long)NFS_FILEID(inode), | |
4f1abd22 | 388 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
389 | atomic_read(&inode->i_count)); |
390 | ||
391 | out: | |
392 | return inode; | |
393 | ||
394 | out_no_inode: | |
03f28e3a | 395 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
396 | goto out; |
397 | } | |
89d77c8f | 398 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 399 | |
536e43d1 | 400 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN) |
1da177e4 LT |
401 | |
402 | int | |
403 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
404 | { | |
405 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
406 | struct nfs_fattr *fattr; |
407 | int error = -ENOMEM; | |
1da177e4 | 408 | |
91d5b470 CL |
409 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
410 | ||
188b95dd JL |
411 | /* skip mode change if it's just for clearing setuid/setgid */ |
412 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
413 | attr->ia_valid &= ~ATTR_MODE; | |
414 | ||
1da177e4 LT |
415 | if (attr->ia_valid & ATTR_SIZE) { |
416 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
417 | attr->ia_valid &= ~ATTR_SIZE; | |
418 | } | |
419 | ||
420 | /* Optimization: if the end result is no change, don't RPC */ | |
421 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 422 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
423 | return 0; |
424 | ||
755c1e20 | 425 | /* Write all dirty data */ |
1d59d61f TM |
426 | if (S_ISREG(inode->i_mode)) { |
427 | nfs_inode_dio_wait(inode); | |
e1552e19 | 428 | nfs_wb_all(inode); |
1d59d61f | 429 | } |
987f8dfc TM |
430 | |
431 | fattr = nfs_alloc_fattr(); | |
432 | if (fattr == NULL) | |
433 | goto out; | |
642ac549 TM |
434 | /* |
435 | * Return any delegations if we're going to change ACLs | |
436 | */ | |
437 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 438 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 439 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 440 | if (error == 0) |
987f8dfc TM |
441 | nfs_refresh_inode(inode, fattr); |
442 | nfs_free_fattr(fattr); | |
443 | out: | |
65e4308d TM |
444 | return error; |
445 | } | |
ddda8e0a | 446 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 447 | |
a3d01454 TM |
448 | /** |
449 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
450 | * @inode: inode of the file used | |
451 | * @offset: file offset to start truncating | |
452 | * | |
453 | * This is a copy of the common vmtruncate, but with the locking | |
454 | * corrected to take into account the fact that NFS requires | |
455 | * inode->i_size to be updated under the inode->i_lock. | |
456 | */ | |
457 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
458 | { | |
c08d3b0e | 459 | loff_t oldsize; |
460 | int err; | |
a3d01454 | 461 | |
c08d3b0e | 462 | err = inode_newsize_ok(inode, offset); |
463 | if (err) | |
464 | goto out; | |
a3d01454 | 465 | |
c08d3b0e | 466 | spin_lock(&inode->i_lock); |
467 | oldsize = inode->i_size; | |
468 | i_size_write(inode, offset); | |
469 | spin_unlock(&inode->i_lock); | |
470 | ||
471 | truncate_pagecache(inode, oldsize, offset); | |
472 | out: | |
473 | return err; | |
a3d01454 TM |
474 | } |
475 | ||
65e4308d TM |
476 | /** |
477 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
478 | * @inode: pointer to struct inode | |
479 | * @attr: pointer to struct iattr | |
480 | * | |
481 | * Note: we do this in the *proc.c in order to ensure that | |
482 | * it works for things like exclusive creates too. | |
483 | */ | |
484 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
485 | { | |
486 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 487 | spin_lock(&inode->i_lock); |
1da177e4 | 488 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
489 | int mode = attr->ia_mode & S_IALLUGO; |
490 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
491 | inode->i_mode = mode; |
492 | } | |
493 | if ((attr->ia_valid & ATTR_UID) != 0) | |
494 | inode->i_uid = attr->ia_uid; | |
495 | if ((attr->ia_valid & ATTR_GID) != 0) | |
496 | inode->i_gid = attr->ia_gid; | |
55296809 | 497 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 498 | spin_unlock(&inode->i_lock); |
65e4308d TM |
499 | } |
500 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 501 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 502 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 503 | } |
1da177e4 | 504 | } |
ddda8e0a | 505 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 506 | |
1da177e4 LT |
507 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
508 | { | |
509 | struct inode *inode = dentry->d_inode; | |
55296809 | 510 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
511 | int err; |
512 | ||
acdc53b2 | 513 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 514 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 515 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
516 | err = filemap_write_and_wait(inode->i_mapping); |
517 | if (err) | |
518 | goto out; | |
28c494c5 | 519 | } |
fc33a7bb CH |
520 | |
521 | /* | |
522 | * We may force a getattr if the user cares about atime. | |
523 | * | |
524 | * Note that we only have to check the vfsmount flags here: | |
525 | * - NFS always sets S_NOATIME by so checking it would give a | |
526 | * bogus result | |
527 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
528 | * no point in checking those. | |
529 | */ | |
530 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
531 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 532 | need_atime = 0; |
fc33a7bb | 533 | |
1da177e4 LT |
534 | if (need_atime) |
535 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
536 | else | |
537 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 538 | if (!err) { |
1da177e4 | 539 | generic_fillattr(inode, stat); |
f43bf0be | 540 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 541 | } |
acdc53b2 | 542 | out: |
1da177e4 LT |
543 | return err; |
544 | } | |
ddda8e0a | 545 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 546 | |
f11ac8db TM |
547 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
548 | { | |
549 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
550 | l_ctx->lockowner.l_owner = current->files; |
551 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db TM |
552 | INIT_LIST_HEAD(&l_ctx->list); |
553 | } | |
554 | ||
555 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
556 | { | |
557 | struct nfs_lock_context *pos; | |
558 | ||
559 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
2a369153 | 560 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 561 | continue; |
2a369153 | 562 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
563 | continue; |
564 | atomic_inc(&pos->count); | |
565 | return pos; | |
566 | } | |
567 | return NULL; | |
568 | } | |
569 | ||
570 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
571 | { | |
572 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 573 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
574 | |
575 | spin_lock(&inode->i_lock); | |
576 | res = __nfs_find_lock_context(ctx); | |
577 | if (res == NULL) { | |
578 | spin_unlock(&inode->i_lock); | |
579 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
580 | if (new == NULL) | |
b3c54de6 | 581 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
582 | nfs_init_lock_context(new); |
583 | spin_lock(&inode->i_lock); | |
584 | res = __nfs_find_lock_context(ctx); | |
585 | if (res == NULL) { | |
586 | list_add_tail(&new->list, &ctx->lock_context.list); | |
587 | new->open_context = ctx; | |
588 | res = new; | |
589 | new = NULL; | |
590 | } | |
591 | } | |
592 | spin_unlock(&inode->i_lock); | |
593 | kfree(new); | |
594 | return res; | |
595 | } | |
596 | ||
597 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
598 | { | |
599 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 600 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
601 | |
602 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
603 | return; | |
604 | list_del(&l_ctx->list); | |
605 | spin_unlock(&inode->i_lock); | |
606 | kfree(l_ctx); | |
607 | } | |
608 | ||
7fe5c398 TM |
609 | /** |
610 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
611 | * @ctx: pointer to context | |
612 | * @is_sync: is this a synchronous close | |
613 | * | |
614 | * always ensure that the attributes are up to date if we're mounted | |
615 | * with close-to-open semantics | |
616 | */ | |
617 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
618 | { | |
619 | struct inode *inode; | |
620 | struct nfs_server *server; | |
621 | ||
622 | if (!(ctx->mode & FMODE_WRITE)) | |
623 | return; | |
624 | if (!is_sync) | |
625 | return; | |
3d4ff43d | 626 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
627 | if (!list_empty(&NFS_I(inode)->open_files)) |
628 | return; | |
629 | server = NFS_SERVER(inode); | |
630 | if (server->flags & NFS_MOUNT_NOCTO) | |
631 | return; | |
632 | nfs_revalidate_inode(server, inode); | |
633 | } | |
ddda8e0a | 634 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 635 | |
5ede7b1c | 636 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
637 | { |
638 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
639 | struct rpc_cred *cred = rpc_lookup_cred(); |
640 | if (IS_ERR(cred)) | |
641 | return ERR_CAST(cred); | |
1da177e4 | 642 | |
f52720ca | 643 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
644 | if (!ctx) { |
645 | put_rpccred(cred); | |
646 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 647 | } |
5ede7b1c AV |
648 | nfs_sb_active(dentry->d_sb); |
649 | ctx->dentry = dget(dentry); | |
650 | ctx->cred = cred; | |
651 | ctx->state = NULL; | |
652 | ctx->mode = f_mode; | |
653 | ctx->flags = 0; | |
654 | ctx->error = 0; | |
655 | nfs_init_lock_context(&ctx->lock_context); | |
656 | ctx->lock_context.open_context = ctx; | |
657 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 658 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
659 | return ctx; |
660 | } | |
89d77c8f | 661 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
662 | |
663 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
664 | { | |
665 | if (ctx != NULL) | |
f11ac8db | 666 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
667 | return ctx; |
668 | } | |
89d77c8f | 669 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 670 | |
7fe5c398 | 671 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 672 | { |
3d4ff43d AV |
673 | struct inode *inode = ctx->dentry->d_inode; |
674 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 675 | |
5c78f58e | 676 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
677 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
678 | return; | |
679 | list_del(&ctx->list); | |
680 | spin_unlock(&inode->i_lock); | |
ef84303e | 681 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 682 | return; |
5c78f58e TM |
683 | if (inode != NULL) |
684 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
685 | if (ctx->cred != NULL) |
686 | put_rpccred(ctx->cred); | |
3d4ff43d AV |
687 | dput(ctx->dentry); |
688 | nfs_sb_deactive(sb); | |
82be417a | 689 | kfree(ctx->mdsthreshold); |
3bec63db TM |
690 | kfree(ctx); |
691 | } | |
692 | ||
a49c3c77 TM |
693 | void put_nfs_open_context(struct nfs_open_context *ctx) |
694 | { | |
695 | __put_nfs_open_context(ctx, 0); | |
696 | } | |
89d77c8f | 697 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 698 | |
1da177e4 LT |
699 | /* |
700 | * Ensure that mmap has a recent RPC credential for use when writing out | |
701 | * shared pages | |
702 | */ | |
cd9a1c0e | 703 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 704 | { |
01cce933 | 705 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
706 | struct nfs_inode *nfsi = NFS_I(inode); |
707 | ||
708 | filp->private_data = get_nfs_open_context(ctx); | |
709 | spin_lock(&inode->i_lock); | |
710 | list_add(&ctx->list, &nfsi->open_files); | |
711 | spin_unlock(&inode->i_lock); | |
712 | } | |
89d77c8f | 713 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 714 | |
d530838b TM |
715 | /* |
716 | * Given an inode, search for an open context with the desired characteristics | |
717 | */ | |
dc0b027d | 718 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
719 | { |
720 | struct nfs_inode *nfsi = NFS_I(inode); | |
721 | struct nfs_open_context *pos, *ctx = NULL; | |
722 | ||
723 | spin_lock(&inode->i_lock); | |
724 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
725 | if (cred != NULL && pos->cred != cred) |
726 | continue; | |
1544fa0f TM |
727 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
728 | continue; | |
729 | ctx = get_nfs_open_context(pos); | |
730 | break; | |
1da177e4 LT |
731 | } |
732 | spin_unlock(&inode->i_lock); | |
733 | return ctx; | |
734 | } | |
735 | ||
b92dccf6 | 736 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 737 | { |
01cce933 | 738 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 739 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
740 | |
741 | if (ctx) { | |
742 | filp->private_data = NULL; | |
743 | spin_lock(&inode->i_lock); | |
744 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
745 | spin_unlock(&inode->i_lock); | |
f895c53f | 746 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
747 | } |
748 | } | |
749 | ||
750 | /* | |
751 | * These allocate and release file read/write context information. | |
752 | */ | |
753 | int nfs_open(struct inode *inode, struct file *filp) | |
754 | { | |
755 | struct nfs_open_context *ctx; | |
1da177e4 | 756 | |
5ede7b1c AV |
757 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
758 | if (IS_ERR(ctx)) | |
759 | return PTR_ERR(ctx); | |
1da177e4 LT |
760 | nfs_file_set_open_context(filp, ctx); |
761 | put_nfs_open_context(ctx); | |
ef79c097 | 762 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
763 | return 0; |
764 | } | |
765 | ||
766 | int nfs_release(struct inode *inode, struct file *filp) | |
767 | { | |
1da177e4 LT |
768 | nfs_file_clear_open_context(filp); |
769 | return 0; | |
770 | } | |
771 | ||
772 | /* | |
773 | * This function is called whenever some part of NFS notices that | |
774 | * the cached attributes have to be refreshed. | |
775 | */ | |
776 | int | |
777 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
778 | { | |
779 | int status = -ESTALE; | |
a3cba2aa | 780 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 781 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
782 | |
783 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
784 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
785 | ||
85233a7a | 786 | if (is_bad_inode(inode)) |
691beb13 | 787 | goto out; |
1da177e4 | 788 | if (NFS_STALE(inode)) |
412d582e | 789 | goto out; |
7fdc49c4 | 790 | |
a3cba2aa TM |
791 | status = -ENOMEM; |
792 | fattr = nfs_alloc_fattr(); | |
793 | if (fattr == NULL) | |
794 | goto out; | |
795 | ||
691beb13 | 796 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 797 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
798 | if (status != 0) { |
799 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
800 | inode->i_sb->s_id, | |
801 | (long long)NFS_FILEID(inode), status); | |
802 | if (status == -ESTALE) { | |
803 | nfs_zap_caches(inode); | |
804 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 805 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
806 | } |
807 | goto out; | |
808 | } | |
809 | ||
a3cba2aa | 810 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
811 | if (status) { |
812 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
813 | inode->i_sb->s_id, | |
814 | (long long)NFS_FILEID(inode), status); | |
815 | goto out; | |
816 | } | |
55296809 | 817 | |
24aa1fe6 | 818 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 819 | nfs_zap_acl_cache(inode); |
55296809 | 820 | |
1da177e4 LT |
821 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
822 | inode->i_sb->s_id, | |
823 | (long long)NFS_FILEID(inode)); | |
824 | ||
412d582e | 825 | out: |
a3cba2aa | 826 | nfs_free_fattr(fattr); |
1da177e4 LT |
827 | return status; |
828 | } | |
829 | ||
830 | int nfs_attribute_timeout(struct inode *inode) | |
831 | { | |
832 | struct nfs_inode *nfsi = NFS_I(inode); | |
833 | ||
d7cf8dd0 TM |
834 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
835 | } | |
836 | ||
837 | static int nfs_attribute_cache_expired(struct inode *inode) | |
838 | { | |
b4d2314b | 839 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 840 | return 0; |
d7cf8dd0 | 841 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
842 | } |
843 | ||
844 | /** | |
845 | * nfs_revalidate_inode - Revalidate the inode attributes | |
846 | * @server - pointer to nfs_server struct | |
847 | * @inode - pointer to inode struct | |
848 | * | |
849 | * Updates inode attribute information by retrieving the data from the server. | |
850 | */ | |
851 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
852 | { | |
44b11874 | 853 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 854 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
855 | return NFS_STALE(inode) ? -ESTALE : 0; |
856 | return __nfs_revalidate_inode(server, inode); | |
857 | } | |
1c606fb7 | 858 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 859 | |
1cda707d | 860 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
861 | { |
862 | struct nfs_inode *nfsi = NFS_I(inode); | |
863 | ||
864 | if (mapping->nrpages != 0) { | |
865 | int ret = invalidate_inode_pages2(mapping); | |
866 | if (ret < 0) | |
867 | return ret; | |
868 | } | |
869 | spin_lock(&inode->i_lock); | |
870 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 871 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 872 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
873 | spin_unlock(&inode->i_lock); |
874 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 875 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
876 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
877 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
878 | return 0; | |
879 | } | |
880 | ||
b4b1eadf TM |
881 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
882 | { | |
883 | if (nfs_have_delegated_attributes(inode)) | |
884 | return false; | |
885 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
886 | || nfs_attribute_timeout(inode) | |
887 | || NFS_STALE(inode); | |
888 | } | |
889 | ||
717d44e8 TM |
890 | /** |
891 | * nfs_revalidate_mapping - Revalidate the pagecache | |
892 | * @inode - pointer to host inode | |
893 | * @mapping - pointer to mapping | |
717d44e8 TM |
894 | */ |
895 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
896 | { | |
897 | struct nfs_inode *nfsi = NFS_I(inode); | |
898 | int ret = 0; | |
dc59250c | 899 | |
29418aa4 MG |
900 | /* swapfiles are not supposed to be shared. */ |
901 | if (IS_SWAPFILE(inode)) | |
902 | goto out; | |
903 | ||
b4b1eadf | 904 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
905 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
906 | if (ret < 0) | |
907 | goto out; | |
7d52e862 | 908 | } |
717d44e8 TM |
909 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
910 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 911 | out: |
44b11874 | 912 | return ret; |
7d52e862 TM |
913 | } |
914 | ||
27dc1cd3 | 915 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
916 | { |
917 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 918 | unsigned long ret = 0; |
a895b4a1 | 919 | |
9e6e70f8 TM |
920 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
921 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
922 | && inode->i_version == fattr->pre_change_attr) { |
923 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
924 | if (S_ISDIR(inode->i_mode)) |
925 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 926 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 927 | } |
a895b4a1 | 928 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
929 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
930 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
931 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
932 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
933 | ret |= NFS_INO_INVALID_ATTR; | |
934 | } | |
9e6e70f8 TM |
935 | |
936 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
937 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
938 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
939 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
940 | if (S_ISDIR(inode->i_mode)) | |
941 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
942 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 943 | } |
9e6e70f8 TM |
944 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
945 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
946 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
947 | && nfsi->npages == 0) { |
948 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
949 | ret |= NFS_INO_INVALID_ATTR; | |
950 | } | |
951 | return ret; | |
a895b4a1 TM |
952 | } |
953 | ||
1da177e4 | 954 | /** |
33801147 | 955 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
956 | * @inode - pointer to inode |
957 | * @fattr - updated attributes | |
958 | * | |
959 | * Verifies the attribute cache. If we have just changed the attributes, | |
960 | * so that fattr carries weak cache consistency data, then it may | |
961 | * also update the ctime/mtime/change_attribute. | |
962 | */ | |
33801147 | 963 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
964 | { |
965 | struct nfs_inode *nfsi = NFS_I(inode); | |
966 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 967 | unsigned long invalid = 0; |
1da177e4 | 968 | |
dc59250c | 969 | |
01da47bd TM |
970 | if (nfs_have_delegated_attributes(inode)) |
971 | return 0; | |
ca62b9c3 | 972 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
973 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
974 | return -EIO; | |
975 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 976 | return -EIO; |
ca62b9c3 | 977 | |
9e6e70f8 | 978 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 979 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 980 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 981 | |
1da177e4 | 982 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 983 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 984 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 985 | |
9e6e70f8 TM |
986 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
987 | cur_size = i_size_read(inode); | |
988 | new_isize = nfs_size_to_loff_t(fattr->size); | |
989 | if (cur_size != new_isize && nfsi->npages == 0) | |
990 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
991 | } | |
1da177e4 LT |
992 | |
993 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
994 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
995 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
996 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
997 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
998 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 999 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1000 | |
1001 | /* Has the link count changed? */ | |
9e6e70f8 | 1002 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1003 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1004 | |
9e6e70f8 | 1005 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1006 | invalid |= NFS_INO_INVALID_ATIME; |
1007 | ||
1008 | if (invalid != 0) | |
1009 | nfsi->cache_validity |= invalid; | |
1da177e4 | 1010 | |
33801147 | 1011 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1012 | return 0; |
1013 | } | |
1014 | ||
a10ad176 | 1015 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1016 | { |
9e6e70f8 TM |
1017 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1018 | return 0; | |
a10ad176 TM |
1019 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1020 | } | |
1021 | ||
1022 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1023 | { | |
9e6e70f8 TM |
1024 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1025 | return 0; | |
a10ad176 TM |
1026 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1027 | } | |
870a5be8 | 1028 | |
ae05f269 | 1029 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1030 | |
1031 | static unsigned long nfs_read_attr_generation_counter(void) | |
1032 | { | |
ae05f269 | 1033 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1034 | } |
1035 | ||
1036 | unsigned long nfs_inc_attr_generation_counter(void) | |
1037 | { | |
ae05f269 | 1038 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1039 | } |
1040 | ||
1041 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1042 | { | |
1043 | fattr->valid = 0; | |
1044 | fattr->time_start = jiffies; | |
1045 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1046 | fattr->owner_name = NULL; |
1047 | fattr->group_name = NULL; | |
4704f0e2 | 1048 | } |
ddda8e0a | 1049 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1050 | |
2d36bfde TM |
1051 | struct nfs_fattr *nfs_alloc_fattr(void) |
1052 | { | |
1053 | struct nfs_fattr *fattr; | |
1054 | ||
1055 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1056 | if (fattr != NULL) | |
1057 | nfs_fattr_init(fattr); | |
1058 | return fattr; | |
1059 | } | |
ddda8e0a | 1060 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1061 | |
1062 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1063 | { | |
1064 | struct nfs_fh *fh; | |
1065 | ||
1066 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1067 | if (fh != NULL) | |
1068 | fh->size = 0; | |
1069 | return fh; | |
1070 | } | |
ddda8e0a | 1071 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1072 | |
e27d359e | 1073 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1074 | /* |
1075 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1076 | * in the same way that wireshark does | |
1077 | * | |
1078 | * @fh: file handle | |
1079 | * | |
1080 | * For debugging only. | |
1081 | */ | |
1082 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1083 | { | |
1084 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1085 | * not on the result */ | |
1086 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); | |
1087 | } | |
1088 | ||
1089 | /* | |
20d27e92 CL |
1090 | * _nfs_display_fhandle - display an NFS file handle on the console |
1091 | * | |
1092 | * @fh: file handle to display | |
1093 | * @caption: display caption | |
1094 | * | |
1095 | * For debugging only. | |
1096 | */ | |
20d27e92 CL |
1097 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1098 | { | |
1099 | unsigned short i; | |
1100 | ||
fa68a1ba | 1101 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1102 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1103 | return; | |
1104 | } | |
1105 | ||
d8e0539e WAA |
1106 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1107 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1108 | for (i = 0; i < fh->size; i += 16) { |
1109 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1110 | ||
1111 | switch ((fh->size - i - 1) >> 2) { | |
1112 | case 0: | |
1113 | printk(KERN_DEFAULT " %08x\n", | |
1114 | be32_to_cpup(pos)); | |
1115 | break; | |
1116 | case 1: | |
1117 | printk(KERN_DEFAULT " %08x %08x\n", | |
1118 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1119 | break; | |
1120 | case 2: | |
1121 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1122 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1123 | be32_to_cpup(pos + 2)); | |
1124 | break; | |
1125 | default: | |
1126 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1127 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1128 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1129 | } | |
1130 | } | |
1131 | } | |
1132 | #endif | |
1133 | ||
a10ad176 TM |
1134 | /** |
1135 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1136 | * @inode - pointer to inode | |
1137 | * @fattr - attributes | |
1138 | * | |
1139 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1140 | * attributes got scheduled after another call carrying updated ones. | |
1141 | * | |
1142 | * To do so, the function first assumes that a more recent ctime means | |
1143 | * that the attributes in fattr are newer, however it also attempt to | |
1144 | * catch the case where ctime either didn't change, or went backwards | |
1145 | * (if someone reset the clock on the server) by looking at whether | |
1146 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1147 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1148 | * |
1149 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1150 | * more recent than the ones cached in the inode. | |
1151 | * | |
1152 | */ | |
1153 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1154 | { | |
1155 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1156 | ||
4704f0e2 | 1157 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1158 | nfs_ctime_need_update(inode, fattr) || |
1159 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1160 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1161 | } |
1162 | ||
1163 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1164 | { | |
1165 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1166 | return nfs_update_inode(inode, fattr); |
1167 | return nfs_check_inode_attributes(inode, fattr); | |
1168 | } | |
1169 | ||
33801147 TM |
1170 | /** |
1171 | * nfs_refresh_inode - try to update the inode attribute cache | |
1172 | * @inode - pointer to inode | |
1173 | * @fattr - updated attributes | |
1174 | * | |
1175 | * Check that an RPC call that returned attributes has not overlapped with | |
1176 | * other recent updates of the inode metadata, then decide whether it is | |
1177 | * safe to do a full update of the inode attributes, or whether just to | |
1178 | * call nfs_check_inode_attributes. | |
1179 | */ | |
1180 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1181 | { | |
33801147 TM |
1182 | int status; |
1183 | ||
1184 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1185 | return 0; | |
1186 | spin_lock(&inode->i_lock); | |
870a5be8 | 1187 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1188 | spin_unlock(&inode->i_lock); |
ef79c097 | 1189 | |
33801147 TM |
1190 | return status; |
1191 | } | |
ddda8e0a | 1192 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1193 | |
d65f557f TM |
1194 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1195 | { | |
1196 | struct nfs_inode *nfsi = NFS_I(inode); | |
1197 | ||
1198 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1199 | if (S_ISDIR(inode->i_mode)) | |
1200 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1201 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1202 | return 0; | |
1203 | return nfs_refresh_inode_locked(inode, fattr); | |
1204 | } | |
1205 | ||
decf491f TM |
1206 | /** |
1207 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1208 | * @inode - pointer to inode | |
1209 | * @fattr - updated attributes | |
1210 | * | |
1211 | * After an operation that has changed the inode metadata, mark the | |
1212 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1213 | * |
1214 | * NB: if the server didn't return any post op attributes, this | |
1215 | * function will force the retrieval of attributes before the next | |
1216 | * NFS request. Thus it should be used only for operations that | |
1217 | * are expected to change one or more attributes, to avoid | |
1218 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1219 | */ |
1220 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1221 | { | |
d65f557f | 1222 | int status; |
decf491f | 1223 | |
7668fdbe | 1224 | spin_lock(&inode->i_lock); |
d65f557f | 1225 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1226 | spin_unlock(&inode->i_lock); |
870a5be8 | 1227 | return status; |
decf491f | 1228 | } |
1c606fb7 | 1229 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1230 | |
70ca8852 TM |
1231 | /** |
1232 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1233 | * @inode - pointer to inode | |
1234 | * @fattr - updated attributes | |
1235 | * | |
1236 | * After an operation that has changed the inode metadata, mark the | |
1237 | * attribute cache as being invalid, then try to update it. Fake up | |
1238 | * weak cache consistency data, if none exist. | |
1239 | * | |
1240 | * This function is mainly designed to be used by the ->write_done() functions. | |
1241 | */ | |
1242 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1243 | { | |
d65f557f TM |
1244 | int status; |
1245 | ||
1246 | spin_lock(&inode->i_lock); | |
1247 | /* Don't do a WCC update if these attributes are already stale */ | |
1248 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1249 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1250 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1251 | | NFS_ATTR_FATTR_PRESIZE | |
1252 | | NFS_ATTR_FATTR_PREMTIME | |
1253 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1254 | goto out_noforce; |
1255 | } | |
9e6e70f8 TM |
1256 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1257 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1258 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1259 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1260 | } |
9e6e70f8 TM |
1261 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1262 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1263 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1264 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1265 | } | |
1266 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1267 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1268 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1269 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1270 | } | |
1271 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1272 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1273 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1274 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1275 | } |
d65f557f TM |
1276 | out_noforce: |
1277 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1278 | spin_unlock(&inode->i_lock); | |
1279 | return status; | |
70ca8852 | 1280 | } |
ddda8e0a | 1281 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1282 | |
1da177e4 LT |
1283 | /* |
1284 | * Many nfs protocol calls return the new file attributes after | |
1285 | * an operation. Here we update the inode to reflect the state | |
1286 | * of the server's inode. | |
1287 | * | |
1288 | * This is a bit tricky because we have to make sure all dirty pages | |
1289 | * have been sent off to the server before calling invalidate_inode_pages. | |
1290 | * To make sure no other process adds more write requests while we try | |
1291 | * our best to flush them, we make them sleep during the attribute refresh. | |
1292 | * | |
1293 | * A very similar scenario holds for the dir cache. | |
1294 | */ | |
24aa1fe6 | 1295 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1296 | { |
8b4bdcf8 | 1297 | struct nfs_server *server; |
1da177e4 | 1298 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1299 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1300 | unsigned long invalid = 0; |
3e7d950a | 1301 | unsigned long now = jiffies; |
62ab460c | 1302 | unsigned long save_cache_validity; |
1da177e4 | 1303 | |
4f1abd22 | 1304 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1305 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1306 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1307 | atomic_read(&inode->i_count), fattr->valid); |
1308 | ||
e73e6c9e MT |
1309 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1310 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1311 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1312 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1313 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1314 | (long long)fattr->fileid); | |
1315 | goto out_err; | |
1316 | } | |
1da177e4 LT |
1317 | |
1318 | /* | |
1319 | * Make sure the inode's type hasn't changed. | |
1320 | */ | |
e73e6c9e MT |
1321 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1322 | /* | |
1323 | * Big trouble! The inode has become a different object. | |
1324 | */ | |
1325 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1326 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1327 | goto out_err; | |
1328 | } | |
1da177e4 | 1329 | |
8b4bdcf8 | 1330 | server = NFS_SERVER(inode); |
a0356862 | 1331 | /* Update the fsid? */ |
9e6e70f8 | 1332 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1333 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1334 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1335 | server->fsid = fattr->fsid; |
1336 | ||
1da177e4 LT |
1337 | /* |
1338 | * Update the read time so we don't revalidate too often. | |
1339 | */ | |
33801147 | 1340 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1341 | |
62ab460c TM |
1342 | save_cache_validity = nfsi->cache_validity; |
1343 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1344 | | NFS_INO_INVALID_ATIME | |
1345 | | NFS_INO_REVAL_FORCED | |
1346 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1347 | |
a895b4a1 | 1348 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1349 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1350 | |
47aabaa7 | 1351 | /* More cache consistency checks */ |
9e6e70f8 | 1352 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1353 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1354 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1355 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1356 | invalid |= NFS_INO_INVALID_ATTR |
1357 | | NFS_INO_INVALID_DATA | |
1358 | | NFS_INO_INVALID_ACCESS | |
1359 | | NFS_INO_INVALID_ACL | |
1360 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1361 | if (S_ISDIR(inode->i_mode)) |
1362 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1363 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1364 | } |
62ab460c TM |
1365 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1366 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1367 | |
1368 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1369 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1370 | } else if (server->caps & NFS_CAP_MTIME) |
1371 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1372 | | NFS_INO_REVAL_FORCED); |
1373 | ||
9e6e70f8 | 1374 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1375 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1376 | } else if (server->caps & NFS_CAP_CTIME) |
1377 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1378 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1379 | |
951a143b | 1380 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1381 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1382 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1383 | cur_isize = i_size_read(inode); | |
1384 | if (new_isize != cur_isize) { | |
1385 | /* Do we perhaps have any outstanding writes, or has | |
1386 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1387 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1388 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1389 | i_size_write(inode, new_isize); |
1390 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1391 | } | |
60c16ea8 HJ |
1392 | dprintk("NFS: isize change on server for file %s/%ld " |
1393 | "(%Ld to %Ld)\n", | |
1394 | inode->i_sb->s_id, | |
1395 | inode->i_ino, | |
1396 | (long long)cur_isize, | |
1397 | (long long)new_isize); | |
1da177e4 | 1398 | } |
62ab460c TM |
1399 | } else |
1400 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1401 | | NFS_INO_REVAL_PAGECACHE | |
1402 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1403 | |
1da177e4 | 1404 | |
9e6e70f8 TM |
1405 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1406 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1407 | else if (server->caps & NFS_CAP_ATIME) |
1408 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1409 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1410 | |
9e6e70f8 TM |
1411 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1412 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1413 | umode_t newmode = inode->i_mode & S_IFMT; |
1414 | newmode |= fattr->mode & S_IALLUGO; | |
1415 | inode->i_mode = newmode; | |
9e6e70f8 | 1416 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1417 | } |
62ab460c TM |
1418 | } else if (server->caps & NFS_CAP_MODE) |
1419 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1420 | | NFS_INO_INVALID_ACCESS | |
1421 | | NFS_INO_INVALID_ACL | |
1422 | | NFS_INO_REVAL_FORCED); | |
1423 | ||
9e6e70f8 TM |
1424 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1425 | if (inode->i_uid != fattr->uid) { | |
1426 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1427 | inode->i_uid = fattr->uid; | |
1428 | } | |
62ab460c TM |
1429 | } else if (server->caps & NFS_CAP_OWNER) |
1430 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1431 | | NFS_INO_INVALID_ACCESS | |
1432 | | NFS_INO_INVALID_ACL | |
1433 | | NFS_INO_REVAL_FORCED); | |
1434 | ||
9e6e70f8 TM |
1435 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1436 | if (inode->i_gid != fattr->gid) { | |
1437 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1438 | inode->i_gid = fattr->gid; | |
1439 | } | |
62ab460c TM |
1440 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1441 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1442 | | NFS_INO_INVALID_ACCESS | |
1443 | | NFS_INO_INVALID_ACL | |
1444 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1445 | |
9e6e70f8 TM |
1446 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1447 | if (inode->i_nlink != fattr->nlink) { | |
1448 | invalid |= NFS_INO_INVALID_ATTR; | |
1449 | if (S_ISDIR(inode->i_mode)) | |
1450 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1451 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1452 | } |
62ab460c TM |
1453 | } else if (server->caps & NFS_CAP_NLINK) |
1454 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1455 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1456 | |
9e6e70f8 | 1457 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1458 | /* |
1459 | * report the blocks in 512byte units | |
1460 | */ | |
1461 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1462 | } |
9e6e70f8 TM |
1463 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1464 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1465 | |
1466 | /* Update attrtimeo value if we're out of the unstable period */ | |
1467 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1468 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1469 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1470 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1471 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1472 | } else { |
64672d55 | 1473 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1474 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1475 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1476 | nfsi->attrtimeo_timestamp = now; | |
1477 | } | |
1da177e4 | 1478 | } |
f2115dc9 | 1479 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1480 | /* Don't invalidate the data if we were to blame */ |
1481 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1482 | || S_ISLNK(inode->i_mode))) | |
1483 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1484 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1485 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1486 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1487 | |
1488 | return 0; | |
b37b03b7 | 1489 | out_err: |
1da177e4 LT |
1490 | /* |
1491 | * No need to worry about unhashing the dentry, as the | |
1492 | * lookup validation will know that the inode is bad. | |
1493 | * (But we fall through to invalidate the caches.) | |
1494 | */ | |
1495 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1496 | return -ESTALE; |
1497 | } | |
1498 | ||
f7b422b1 | 1499 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1500 | { |
1501 | struct nfs_inode *nfsi; | |
e94b1766 | 1502 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1503 | if (!nfsi) |
1504 | return NULL; | |
55296809 CL |
1505 | nfsi->flags = 0UL; |
1506 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1507 | #ifdef CONFIG_NFS_V3_ACL |
1508 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1509 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1510 | #endif | |
89d77c8f | 1511 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1512 | nfsi->nfs4_acl = NULL; |
1513 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1514 | return &nfsi->vfs_inode; |
1515 | } | |
89d77c8f | 1516 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1517 | |
fa0d7e3d | 1518 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1519 | { |
fa0d7e3d | 1520 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1521 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1522 | } | |
1523 | ||
fa0d7e3d NP |
1524 | void nfs_destroy_inode(struct inode *inode) |
1525 | { | |
1526 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1527 | } | |
89d77c8f | 1528 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1529 | |
d75d5414 AM |
1530 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1531 | { | |
89d77c8f | 1532 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1533 | INIT_LIST_HEAD(&nfsi->open_states); |
1534 | nfsi->delegation = NULL; | |
1535 | nfsi->delegation_state = 0; | |
1536 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1537 | nfsi->layout = NULL; |
d75d5414 AM |
1538 | #endif |
1539 | } | |
f7b422b1 | 1540 | |
51cc5068 | 1541 | static void init_once(void *foo) |
1da177e4 LT |
1542 | { |
1543 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1544 | ||
a35afb83 | 1545 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1546 | INIT_LIST_HEAD(&nfsi->open_files); |
1547 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1548 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1549 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1550 | nfsi->npages = 0; |
ea2cf228 | 1551 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1552 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1553 | atomic_set(&nfsi->silly_count, 1); |
1554 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1555 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1556 | nfs4_init_once(nfsi); |
1da177e4 | 1557 | } |
20c2df83 | 1558 | |
f7b422b1 | 1559 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1560 | { |
1561 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1562 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1563 | 0, (SLAB_RECLAIM_ACCOUNT| |
1564 | SLAB_MEM_SPREAD), | |
20c2df83 | 1565 | init_once); |
1da177e4 LT |
1566 | if (nfs_inode_cachep == NULL) |
1567 | return -ENOMEM; | |
1568 | ||
1569 | return 0; | |
1570 | } | |
1571 | ||
266bee88 | 1572 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1573 | { |
8c0a8537 KS |
1574 | /* |
1575 | * Make sure all delayed rcu free inodes are flushed before we | |
1576 | * destroy cache. | |
1577 | */ | |
1578 | rcu_barrier(); | |
1a1d92c1 | 1579 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1580 | } |
1581 | ||
5746006f | 1582 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1583 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1584 | |
1585 | /* | |
1586 | * start up the nfsiod workqueue | |
1587 | */ | |
1588 | static int nfsiod_start(void) | |
1589 | { | |
1590 | struct workqueue_struct *wq; | |
1591 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1592 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1593 | if (wq == NULL) |
1594 | return -ENOMEM; | |
1595 | nfsiod_workqueue = wq; | |
1596 | return 0; | |
1597 | } | |
1598 | ||
1599 | /* | |
1600 | * Destroy the nfsiod workqueue | |
1601 | */ | |
1602 | static void nfsiod_stop(void) | |
1603 | { | |
1604 | struct workqueue_struct *wq; | |
1605 | ||
1606 | wq = nfsiod_workqueue; | |
1607 | if (wq == NULL) | |
1608 | return; | |
1609 | nfsiod_workqueue = NULL; | |
1610 | destroy_workqueue(wq); | |
1611 | } | |
1612 | ||
1b340d01 | 1613 | int nfs_net_id; |
9e2e74db | 1614 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1615 | |
1616 | static int nfs_net_init(struct net *net) | |
1617 | { | |
6b13168b | 1618 | nfs_clients_init(net); |
1b340d01 SK |
1619 | return nfs_dns_resolver_cache_init(net); |
1620 | } | |
1621 | ||
1622 | static void nfs_net_exit(struct net *net) | |
1623 | { | |
1624 | nfs_dns_resolver_cache_destroy(net); | |
28cd1b3f | 1625 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1626 | } |
1627 | ||
1628 | static struct pernet_operations nfs_net_ops = { | |
1629 | .init = nfs_net_init, | |
1630 | .exit = nfs_net_exit, | |
1631 | .id = &nfs_net_id, | |
1632 | .size = sizeof(struct nfs_net), | |
1633 | }; | |
1634 | ||
1da177e4 LT |
1635 | /* |
1636 | * Initialize NFS | |
1637 | */ | |
1638 | static int __init init_nfs_fs(void) | |
1639 | { | |
1640 | int err; | |
1641 | ||
e571cbf1 | 1642 | err = nfs_dns_resolver_init(); |
1b340d01 | 1643 | if (err < 0) |
89d77c8f | 1644 | goto out10;; |
1b340d01 SK |
1645 | |
1646 | err = register_pernet_subsys(&nfs_net_ops); | |
e571cbf1 | 1647 | if (err < 0) |
89d77c8f | 1648 | goto out9; |
e571cbf1 | 1649 | |
8ec442ae DH |
1650 | err = nfs_fscache_register(); |
1651 | if (err < 0) | |
89d77c8f | 1652 | goto out8; |
8ec442ae | 1653 | |
5746006f TM |
1654 | err = nfsiod_start(); |
1655 | if (err) | |
89d77c8f | 1656 | goto out7; |
5746006f | 1657 | |
6aaca566 DH |
1658 | err = nfs_fs_proc_init(); |
1659 | if (err) | |
89d77c8f | 1660 | goto out6; |
6aaca566 | 1661 | |
1da177e4 LT |
1662 | err = nfs_init_nfspagecache(); |
1663 | if (err) | |
89d77c8f | 1664 | goto out5; |
1da177e4 LT |
1665 | |
1666 | err = nfs_init_inodecache(); | |
1667 | if (err) | |
89d77c8f | 1668 | goto out4; |
1da177e4 LT |
1669 | |
1670 | err = nfs_init_readpagecache(); | |
1671 | if (err) | |
89d77c8f | 1672 | goto out3; |
1da177e4 LT |
1673 | |
1674 | err = nfs_init_writepagecache(); | |
1675 | if (err) | |
89d77c8f | 1676 | goto out2; |
1da177e4 | 1677 | |
1da177e4 LT |
1678 | err = nfs_init_directcache(); |
1679 | if (err) | |
89d77c8f | 1680 | goto out1; |
1da177e4 LT |
1681 | |
1682 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1683 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1684 | #endif |
f7b422b1 | 1685 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1686 | goto out0; |
1687 | ||
1da177e4 | 1688 | return 0; |
129d1977 | 1689 | out0: |
1da177e4 | 1690 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1691 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1692 | #endif |
1da177e4 | 1693 | nfs_destroy_directcache(); |
89d77c8f | 1694 | out1: |
129d1977 | 1695 | nfs_destroy_writepagecache(); |
89d77c8f | 1696 | out2: |
129d1977 | 1697 | nfs_destroy_readpagecache(); |
89d77c8f | 1698 | out3: |
129d1977 | 1699 | nfs_destroy_inodecache(); |
89d77c8f | 1700 | out4: |
129d1977 | 1701 | nfs_destroy_nfspagecache(); |
89d77c8f | 1702 | out5: |
129d1977 | 1703 | nfs_fs_proc_exit(); |
89d77c8f | 1704 | out6: |
129d1977 | 1705 | nfsiod_stop(); |
89d77c8f | 1706 | out7: |
129d1977 | 1707 | nfs_fscache_unregister(); |
89d77c8f | 1708 | out8: |
129d1977 | 1709 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1710 | out9: |
129d1977 | 1711 | nfs_dns_resolver_destroy(); |
89d77c8f | 1712 | out10: |
1da177e4 LT |
1713 | return err; |
1714 | } | |
1715 | ||
1716 | static void __exit exit_nfs_fs(void) | |
1717 | { | |
1da177e4 | 1718 | nfs_destroy_directcache(); |
1da177e4 LT |
1719 | nfs_destroy_writepagecache(); |
1720 | nfs_destroy_readpagecache(); | |
1721 | nfs_destroy_inodecache(); | |
1722 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1723 | nfs_fscache_unregister(); |
1b340d01 | 1724 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1725 | nfs_dns_resolver_destroy(); |
1da177e4 | 1726 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1727 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1728 | #endif |
f7b422b1 | 1729 | unregister_nfs_fs(); |
6aaca566 | 1730 | nfs_fs_proc_exit(); |
5746006f | 1731 | nfsiod_stop(); |
1da177e4 LT |
1732 | } |
1733 | ||
1734 | /* Not quite true; I just maintain it */ | |
1735 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1736 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1737 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1738 | |
1739 | module_init(init_nfs_fs) | |
1740 | module_exit(exit_nfs_fs) |